Check a secure BTnet quote room by its token (returned by request_btnet_best_price, or given by the buyer from their quote room link). Returns the room state (submitted, with_bt, survey_needed, priced, accepted or declined); when priced it includes the confirmed monthly figure with its reference and valid_until date, any upfront, the specialist's note, and the Q&A thread. The token is the credential: only call with a token the buyer provided in this conversation.